• Difficulty in demoulding(In the process of injection moulding, it is difficult to demould the material.)
    Bensong Solution

    1. Increase the taper of demoulding and polish the surface of mould.

    2. Increase the number of thimbles or the diameter of thimbles.

    3. Extend cooling time, reduce barrel temperature and die temperature.


  • Crazing(In the process of injection moulding, craze appears in the material.)
    Bensong Solution

    1. Strengthen drying, prolong drying time or use vacuum drying.

    2. Reduce barrel temperature and screw speed.

    3. Reduce the injection speed and pressure.

    4. Check whether there are impurities in the material and increase back pressure appropriately.


  • weld line(In the process of injection moulding, there are fusion lines in the material.)
    Bensong Solution

    1. Increase injection pressure, speed, barrel temperature and mould temperature.

    2. Change the gate position so that the fusion lines appear in the parts that are not loaded or significant; set up a cooling well to discharge the cold materials at the fusion lines.


  • warping(In the process of injection moulding, material warpage occurs.)
    Bensong Solution

    1. Adjust the temperature control of the die to make the cooling uniform.

    2. The design of the product should make the wall thickness uniform as far as possible.

    3. Reduce injection pressure and pressure retention.

    4. Reduce the injection speed.


  • Floating fiber(Floating fibers and poor appearance appeared in the process of injection moulding engine cover.)
    Bensong Solution

    1. Increase the injection speed.

    2. Increase die temperature.

    3. Reduce the temperature of metering room and the amount of sol.


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